Preparation

By squeezing a light state the quantum uncertainty of one observable is reduced at the cost of a higher uncertainty in the conjugate observable. Apart from improving the sensitivity of metrological applications, squeezed states are used to create continuous variable entanglement which is a key ingredient for many quantum information tasks. (more...)

Protocols

Quantum Key Distribution

Quantum Hacking

Quantum Cloning

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Measurement

For applications in quantum information protocols we are performing research on optimal single measurements of quantum states. The full characterization of quantum states additionally requires reconstruction techniques, which derive the information from measurements on an ensemble of identical states. (more...)